The Spitfire parts won't fit, they use a different bolt circle.
I agree with Charley, inspect any used components VERY carefully. My previous TR3A had worn out hubs and splines when I got it; which I didn't discover until one day I tried to take off up a hill, and instead of the car moving, one of the rear hubs just went ziZZZZZ! Fortunately the others were still holding, or I might have been rolling backwards down the hill with no brakes...
For example, this spline is badly worn and near the end of it's life:
